<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="test"></div>
    <script src="../lib2/react.development.js"></script>
    <!-- //引入核心库 -->
    <script src="../lib2//react-dom.development.js"></script>
    <!-- //支持react的dom操作 -->
    <script src="../lib/babel.min.js"></script>
    <script type="text/babel">
        class MyComponent extends React.Component{
            state={data:new Date()}
            componentDidMount(){
                const {data}=this.state.data
                setInterval(()=>{
                  this.setState({data:new Date()})
                },0)
            }
            render(){
                return(
                    <div>
                    <div>{this.state.data.toTimeString()}</div>
                    </div>
                )
            }
        }
        ReactDOM.render(<MyComponent/>,document.getElementById('test'))
        </script>
</body>
</html>